Fluttering noise at low speed,siren type noise at higher speeds,push 4hi,noise goes away
SOURCE: My 98 chevy blazer won't shift into 4wd.
Most common problem is the vacuum diaphragm that is so inconviently mounted UNDER the battery tray.The cable that locks in the front diff is attached to it and vacuum pulls it in/out.
SOURCE: 99 chevy s-10 4x4 (push button) stuck in 4hi
do you have to truck in neutrul when trying to swtich back. some models you need to put it into 4 low then into 2 hi.
SOURCE: 95 chevy blazer 4low works..but when shifting into
My guess is that it is probably the actuator on the front diff. It may also be the buttons. I had the same problem with my 1999 silverado which it turned out to be the actuator.
SOURCE: 2004 Blazer won't shift into four wheel drive. I
ok what i would try is put the truck in park then try to **** into your 4wheel drive high or low, other than that with the computer thats on board you may just have a technical issue that can be solved at the dealership
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